void main()
{
  /* Manual back-face culling. Not ideal for performance
   * but needed for view clarity in X-ray mode and support
   * for inverted bone matrices. */
  if ((inverted == 1) == gl_FrontFacing) {
    discard;
  }
  fragColor = vec4(finalColor.rgb, alpha);
  lineOutput = vec4(0.0);
}